These fonts represent translation to PostScript Type 1 of the ESSTIX fonts. ESSTIX seem to have been a precursor to the STIX project, and were donated by Elsevier to that project. The accompanying virtual fonts with customized metrics and LaTeX support files allow their use as calligraphic, fraktur and double-struck (blackboard bold) in maths mode.
Binary packages can be installed with the high-level tool pkgin (which can be installed with pkg_add) or pkg_add(1) (installed by default). The NetBSD packages collection is also designed to permit easy installation from source.
The pkg_admin audit command locates any installed package which has been mentioned in security advisories as having vulnerabilities.
Please note the vulnerabilities database might not be fully accurate, and not every bug is exploitable with every configuration.
Problem reports, updates or suggestions for this package should be reported with send-pr.